Improvement in pitman-connections for harvesters



ogcooLm. PITMAN CONNECTIONS FOR HARVESTERS.

M 173,161 v v huma Feb. 1876.VA

N.FETERS. PHDTOLTHOGRAPHER. WASHINGTON. C,

rrnn STATES PATENT" OFFICE. y

ORVILLE COOLEY, OF BROCKPORT, NEWV YORK, ASSIGNOR TO JOHNSTON HARVESTER COMPANY, OF lSAME PLACE.

-IMPROVEMENT IN PITMAN-CONNECTIONS FOR HARVESTERS.

Specification forming part of Letters Patent No. 173,161, dated February 8, 1876; application filed December 18, 1875.

CASE B.

1b all whom it may concern:

Beit kno'wn that I, ORVILLE OOOLEY, of

l Brockport, in the county ot' Monroe and State of New York, have invented a new and Improved Adjustable Pitman Connection for Reapers, Mowers, Harvesters, and other machinery; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanyin g drawings forming a part of this speciiication, in which- Figure l is a plan `ot' the pitman complete 5 Fig. 2, a side elevation of the same; and Fig. 3 a section of knife with head attached.

Similar letters ofvreference in the accompanying drawings denote the same parts.

The object of this invention is toproduce a simple and neat, but strong and durable, jointconnection for pitmen, which may be easily and readily adjusted so as to make the p arts work closely and tightly, or loosely and ilexibly, and in which the parts shall not be lia-ble to become detached and lost.' To these ends, the' invention consists in the construction and combination of parts as I will 110W proceed to set forth.

In the drawings, P is 'the pitman, having, as here represented, a ball-and-socket connection at the knife end, and a swivel-and-socket connection at the crank end. One-half of the ball-and-socket connection is formed by a stout metal plate, a, bolted or riveted firmly to onel side ofthe pitman. The other half is formed ofa stout plate, al, riveted to the opposite side of the pitman, preferably by bolts 0r rivets passing through and securing both pla tes, said plate al having at its outer end a hinged leaf, a2, the outer end of which is formed into a halfsocket, the counterpart of that shown on the plate a. The hinge gives the part a2 all nec. essary flexibility, and prevents it under any circumstances from being disconnected and 10st, either before or after attachment to the piston. A ball projection, D, formed on or attached to the head ofthe knife C, is adapted to engage with the socket above described to complete the connection. The two parts a a2 are held together by a lscrew-bolt, E, by means of which the joint may be tightened or loosened at will, or the pitman and cutter disconnected Whenever necessary. To prevent the nut F from working oft' I employ any suitable lock-nnt or locking device, preferably a notched nut, and a locking rivet or Wire passing through a hole represented near the end ofthe bolt. At the opposite end of the pitman substantially the same construction is represented for making the connection to the driving-crank-a rigid plate, B, corresponding to the plate ct, a jointed plate, B1B2, corresponding to the jointed plate al a2, and a bolt and screw-nut, e F,`corresponding to the bolt and nut E F above described. Instead, however, of making hemispherical cavities in the plates to receive a ball, I provide the plates. with vinternal studs or trunnions, which iit into recessesl in the ends of the swivel-block G, holding it in place and permitting it a free swivcling movement. The crank-pin passes through Va suitable box or socket in the swiveling-block. Substantially the same advantages are derived from this con-struction as fromv the ball-andsocket construction at the oppositeend of the pitman, the difference between' the two modes of construction being merely in their adaptations to' their slightly different requirements. a t Having thus described my invention, I claim as new In a pitman-joint connection, the combination of the rigid plate A or B with the hinged plate al a2 or Bl B2, the. parts of' which are permanently connected together, and with the bolt e, and ball or swivel block, substantially as described, for the purposes set forth.

ORVILLE OOOLEY. Witnesses: Y

R. D. DEWEY, F. S. STEBBINS. 

